package _Collection;

import java.util.HashMap;
        import java.util.HashSet;
        import java.util.Scanner;

public class _Map {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        HashMap hashMapExample = new HashMap<>();
        for (int i = 0; i < 2; i++) {
            hashMapExample.put(scanner.next(), scanner.next());
        }
// ---------------------Begin------------------------

        hashMapExample.put("secondkey", "educode");
        hashMapExample.remove("firstkey");
        hashMapExample.put("name", "lihong");
        System.out.println(hashMapExample);

// ---------------------End------------------------
    }
}